Illustrating apparatus



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ritmiscrsmicrrrnil rraiziffus 'I Application filed June 3,

This invention relates to new and useful improvements in an illustrating apparatus.

One object oftheinventioneis,to provide an educational apparatus designed for use in illustrating the formation of Aimages of object-s on a screen.

Another object of the-invention is to provide an apparatus designed for the purpose of delineating the image of an object on a screen by the use of a cellular structure, in association with the screen, whereby only certain rays of light reflected from the object are permitted to reach the screen.V

A further feature of the invention resides in the provision of an apparatus of the character described specially designed for use in teaching biology, and is illustrative of certain features of the eye formation of certain forms of animal life. l

With the above and other objects in view this invention has particular relation to certain novel features of` construction, operation and arrangement of parts, an example of which is described in this specification and illustrated in the accompanying drawings, wherein Figure 1 shows a front elevation of the casing. '-1

Figure 2 shows a front elevation with the reflecting object in front thereof. f

Figure 3v shows a,v horizontal sectional view. v r

Figure 4 shows a front elevation Awith the cellular structure therein, and l Figure 5 shows a plan view of the apparatus, and associated reflecting object and source of light. i*

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures the numeral 1 designates a suitable casing preferably having opaque side walls, top and bottom. The rear wall 2, of the casing, lforms a translucid screen and may, for convenience, be formed of frosted glass. This screen corresponds to the retina of the eye. The front of the casing is open, or if desired may have a transparent pane therein.

Within the casing there is a cellular EDGAR ALTENBURG,

mfr-f; r-f OF HOUSTON, TEXAS Ystructure 3 having *a'plu'rality of substantially f' parallel light f'passageways -4 there- -thcmgh',from front tolrearf f"1" 1"',

The apparatus isdesigrned to'b'e used in a gimageis' to 'be' delineated on theI screen 2, is placed iiifront ofthe apparat-us'and valight bis arranged alongside the casing'lin'su'ch a position that onlyraysI of lightjreflectcd -from the object will pass through-the pas sageway'i'and onto the -screen 2. The image 'of the object will-thus be outlined'non "the screenl -1 imfis'heretofore stated lthis apparatusih'as been specifically designed for use in'illus-y fftratingcertain features :of the? formation 'and lmechanism of'op'eration' of the: eyefof certain forms off animal -life' givingfin structionin biology. 5l The' apparatus' lshown Offene eye 'formation f of "knp'wirins'et, i but the apparatus isi'ntededfor illustrating the rmechanism of (image1 formation fb'yf the 'eyeofcertain forms'offins'e'ct lifeqfThe apparatus Yas illustrated shows the? structure of the insect eye` only in regard to the structure vof the parts essential to image formation, namely the long tubular elements known as @which in the drawing of the appara us, are represented by the cellular structure 3 with the long substantially parallel light passageway 4 therethrough. In

the actual eye of certain insects, these tubular elements are hexagonal 1n cross section.

tapering towards their inner or attachedj,

t'us may be adapted for photographic pur.

oses.

W'hat I claim is 1. An apparatus for illustrating image formation by the compound eye including a cellular struct-ure formed with substantially lm 4 c i g t n.

fi's'not intended to he, no1- s iaanle'xact modelw 2 1,791,994 .5333i f. l

parallel, unobstructed, lifrht passageways and a screen disposed to cut t 1e axial lines of said passageways.

2. An apparatus for illustrating image 5 formation by the compound eye including a cellular structure formed with substantially parallel, unobstructed, light passa'geways a. and a translucid screen associated Withsaid 1M; structure and formed to receive an imagexmvdw and disposed transversely across the axial lines of said passageways. 3. An apparatus for illustrating image formation by the compound eye including a casing having a translucid Wall forming an image receiving screen' and a cellular structure Wit-hin the casing and formed with substantially parallel light passageways disposed in substantially right angular relation to said screen. ,a 4. An apparatus for illustrating image [I formation by the compound eye including a cellular structure, a` screen associated with said structure said structure having a plurality of elongated light passageways Whose longitudinal axes are disposed angularly with respect to the screen surface to permit the reception of a selected group of light rays, from an object in front of the apparatus, through said passageways, by said screen, so as to form an image on the screen. 5. An apparatus for illustrating image ,i formation by the compound eye including an z image receiving screen having a substantially plane surface and a cellular structure asl l sociated therewith, and having elongated light passageways so arranged that the axial lines of said passageways will be intercepted by the screen surface. i y

In testimony whereof I have signed my name to this specification.

EDGARALTENBURG." 

